4 6 
bulletin 94 . 
fuscous brown to almost a uniform and rather light rust-yel¬ 
low. The lighter colored specimens occur mostly in the 
southern portion of the State. The post-ocular stripe varies 
from a broad and distinct black band to none. The subgeni¬ 
tal plate is usually notched but in some specimens it is trun¬ 
cate. It seems quite probable to me that this species is noth¬ 
ing more than a form of cingustipennis having red hind tibiae. 
The males we have taken vary between 19 mm. and 24 
mm. in length. The females resemble allied species so closely 
that it is difficult or even impossible to distinguish them. 
The only native food-plant we have recorded for this 
species is Artemisia jilifolia. We have also taken it common 
on alfalfa and on young apple and plum trees. 
Specimens have been taken at the following places: Ft. 
Collins (common), Laporte, Livermore, Dutch George’s, Tim- 
nath, Greeley, Orchard, Julesburg, LaSalle, Boulder, Pueblo, 
Colorado Springs, Canon City, Lamar and Holly. Adult 
males and females have been taken at Ft. Collins as early a* 
July 10, 1901, and as late as October 12, 1898. 
comptus Scudd. We have a half dozen specimens of what seem to 
be M . coccineipes except that the furcula are nearly straight 
and but little diverging. So, while I should consider these 
as varieties of coccineipes I list them here because they seem 
to correspond better with the form that has been described as 
comptus . The specimens were all taken near Ft. Collins 
where we have done most of our collecting for M. coccineipes . 
conspersus Scudd. This species occurs over the eastern plains and 
in the mountain parks of the eastern slope to an elevation of 
something over 8,000 feet. The species was found fairly 
common, for example, near Alder at an altitude of 8,500 feet 
on native grass land. It occurs most abundantly, however, 
on the grassy slopes of the foothills and upon the plains just 
outside the hills. While this locust has been found chiefly 
upon native grass-pasture land it has also been noted as feed¬ 
ing upon cabbages and alfalfa in moderate numbers. So the 
species is doubtless capable of adapting itself to a diet of cul¬ 
tivated plants if its supply of native food-plants should run 
short. It probably causes considerable damage where abund¬ 
ant upon native pasture land. 
Our earliest capture of an adult of this species was at 
Greeley, July 13, 1898. But very few adults have been taken 
before Aug. 5th. Our latest capture was at Julesburg, Nov. 
8, 1902. 
